How to view oracle logs

For Oracle database administrators, viewing Oracle logs is a very important task. Oracle logs include a lot of useful information, such as database performance, security, and troubleshooting issues. In this article, we will explore how to view logs in Oracle database.

1. View warning and error logs

Oracle database warning and error logs can help administrators quickly identify and solve problems. To view these logs, you can use the following command:

SQL> SHOW ERRORS;
SQL> SHOW ALERT;

The SHOW ERRORS command displays the error information of the latest SQL statement, while the SHOW ALERT The command displays warning and error messages. Additionally, administrators can view the warning and error logs using the following command:

SQL> SELECT * FROM V$DIAG_INFO WHERE NAME = 'Diag Trace';

This command will display warnings and errors The relevant path and file name of the log.

2. View database performance log

Oracle database provides a variety of performance optimization functions and also provides detailed performance logs. Administrators can use the following command to view the activities of the current session:

SQL> SELECT * FROM V$SESSION;

This command will display information related to the currently active session, such as session ID, Username, connection time, etc.

In addition to the activity log of the current session, administrators can also use the following command to view the performance statistics of the Oracle database:

SQL> SELECT * FROM V$SYSSTAT;

This command will display the performance statistics of the Oracle database, such as physical reads, logical reads, and partition IO data.

3. View the security log

For security administrators, viewing the security log of the Oracle database is an important task. Oracle database can record information such as user login, success or number of failed attempts. Administrators can use the following command to view the security log of the Oracle database:

SQL> SELECT * FROM DBA_AUDIT_TRAIL;

This command will display the security log of the Oracle database, including login, audit, table access and Activities such as character modification.

Summary

Viewing Oracle logs is an important task for database administrators. In this article, we explained how to view warning and error logs, database performance logs, and security logs. These logs contain a wealth of information that can help administrators troubleshoot database performance and security issues. Come and do it!

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